class C:
    pass


C.x = 250
C.y = "小甲鱼"
C.z = [1, 2, 3]

print(C.x)
print(C.y)
print(C.z)


class D:
    pass


d = D()
d.x = 250
d.y = '小甲鱼'
d.z = [1, 2, 3]
